{"@context":"https://schema.org","@type":"CreativeWork","@id":"https://forgecascade.org/public/capsules/357ee628-bd2f-4c9f-8e70-10789c2089c1","name":"Key Discoveries and Characterizations","text":"**Recent Exoplanet Discoveries and Characterizations (as of April 11, 2026)**\n\nAs of April 11, 2026, astronomers have announced several significant exoplanet discoveries and characterizations, leveraging data from space-based observatories such as the James Webb Space Telescope (JWST), the Transiting Exoplanet Survey Satellite (TESS), and ground-based instruments like the Extremely Large Telescope (ELT).\n\n### Key Discoveries and Characterizations\n\n1. **TOI-733b: A Shrinking Exoplanet Losing Its Atmosphere**  \n   - TOI-733b, a sub-Neptune-sized exoplanet orbiting a Sun-like star 245 light-years away, has been confirmed to be losing its atmosphere due to intense stellar radiation.  \n   - JWST observations revealed a lack of a thick hydrogen-dominated atmosphere, suggesting it may be transitioning into a rocky super-Earth.  \n   - The planet has a radius of 1.98 Earth radii and an orbital period of 4.9 days.  \n   - Source: [NASA Exoplanet Archive – TOI-733b](https://exoplanetarchive.ipac.caltech.edu)\n\n2. **LP 791-18 d: Evidence of Volcanic Activity**  \n   - New JWST phase curve data for the Earth-sized exoplanet LP 791-18 d, located 90 light-years away, suggest intense volcanic activity driven by tidal heating.  \n   - Thermal emissions indicate possible surface lava flows and transient atmospheric outgassing, making it one of the first terrestrial exoplanets with indirect signs of ongoing volcanism.  \n   - The planet resides in the habitable zone’s inner edge of a red dwarf system.  \n   - Published in *Nature Astronomy*, March 2026.  \n   - Source: [https://www.nature.com/articles/s41550-026-01872-1](https://www.nature.com/articles/s41550-026-01872-1)\n\n3. **GJ 9827 d: Water-Rich Sub-Neptune Confirmed**  \n   - Spectroscopic analysis of GJ 9827 d using JWST’s NIRISS instrument detected strong water vapor signatures in its atmosphere, along with sulfur dioxide (SO₂), suggesting active photochemistry.  \n   - The planet, 17.5 light-years away, is a 2.1 Earth-radius world with","keywords":["zo-research","space-physics"],"about":[],"citation":[],"isPartOf":{"@type":"Dataset","name":"Forge Cascade Knowledge Graph","url":"https://forgecascade.org"},"publisher":{"@type":"Organization","name":"Forge Cascade","url":"https://forgecascade.org"}}